The valley Balkh lived in was situated at a strategic location of the Withered Leaf Promenade.
Marvin couldn't understand why a relative of a Demon Lord would come here, but since he had built an altar, it was very likely that he wanted to establish his own power here.
From what he knew, many sinister spells from the Abyss were linked to altars, needing the power from the altars to cast them.
Demon Wizards on an altar, especially Legend level ones, were even more terrifying than other Wizards holding an [Unlimited Magic Eye].
Marvin had assassinated a Demon Wizard in the past, but he had died three times before finally succeeding. It was due to the frightening amount of bonus abilities that the Wizard gained from the altar.
For example, an altar could let a Demon Wizard's soul resurrect within it, basically granting powerful Demon Wizards the benefits of being a Lich.
Thus, altars were like a stronger version of Wizard Towers.
